package io;

import java.io.*;

/**
 * java将流分成节点流和处理流
 * 节点流:也称低级流  是实际连接程序与另一端的"管道"负责实际读写数据
 *
 *
 * 缓冲流:
 * java.io.BufferedInputStream
 * java.io.BufferedOutputStream
 */
public class CopyDemo03 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("image.png");
        BufferedInputStream bis = new BufferedInputStream(fis);
        FileOutputStream fos = new FileOutputStream("image_cc.png");
        BufferedOutputStream bos = new BufferedOutputStream(fos);

        int d ;
        long start = System.currentTimeMillis();
        while ((d = bis.read())!=-1){
            bos.write(d);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕,耗时"+(end-start)+"ms");
    }
}
